netscape.cpp

//C- -*- C++ -*-//C- -------------------------------------------------------------------//C- DjVuLibre-3.5//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.//C- Copyright (c) 2001 AT&T//C-//C- This software is subject to, and may be distributed under, the//C- GNU General Public License, either Version 2 of the license,//C- or (at your option) any later version. The license should have//C- accompanied the software or you may obtain a copy of the license//C- from the Free Software Foundation at http://www.fsf.org .//C-//C- This program is distributed in the hope that it will be useful,//C- but WITHOUT ANY WARRANTY; without even the implied warranty of//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the//C- GNU General Public License for more details.//C- //C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library from//C- Lizardtech Software. Lizardtech Software has authorized us to//C- replace the original DjVu(r) Reference Library notice by the following//C- text (see doc/lizard2002.djvu and doc/lizardtech2007.djvu)://C-//C- ------------------------------------------------------------------//C- | DjVu (r) Reference Library (v. 3.5)//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.//C- | The DjVu Reference Library is protected by U.S. Pat. No.//C- | 6,058,214 and patents pending.//C- |//C- | This software is subject to, and may be distributed under, the//C- | GNU General Public License, either Version 2 of the license,//C- | or (at your option) any later version. The license should have//C- | accompanied the software or you may obtain a copy of the license//C- | from the Free Software Foundation at http://www.fsf.org .//C- |//C- | The computer code originally released by LizardTech under this//C- | license and unmodified by other parties is deemed "the LIZARDTECH//C- | ORIGINAL CODE." Subject to any third party intellectual property//C- | claims, LizardTech grants recipient a worldwide, royalty-free, //C- | non-exclusive license to make, use, sell, or otherwise dispose of //C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the //C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU //C- | General Public License. This grant only confers the right to //C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to //C- | the extent such infringement is reasonably necessary to enable //C- | recipient to make, have made, practice, sell, or otherwise dispose //C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to //C- | any greater extent that may be necessary to utilize further //C- | modifications or combinations.//C- |//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.//C- +------------------------------------------------------------------// // $Id: netscape.cpp,v 1.10 2007/03/25 20:48:23 leonb Exp $// $Name: debian_version_3_5_20-7 $#ifdef HAVE_CONFIG_H# include "config.h"#endif#if NEED_GNUG_PRAGMAS# pragma implementation#endif#include "ZPCodec.h"// Hates to be included after QT stuff#include "netscape.h"#include "debug.h"#include "dispatch.h"#include "io.h"// #ifdef DJVU_EDITOR// #include "djvu_terminator.h"// #endif#include <unistd.h>#include <fcntl.h>#include <sys/socket.h>#include <netinet/in.h>#include <sys/types.h>#include <sys/time.h>#include <arpa/inet.h>#include <errno.h>#include <qsocketnotifier.h>#include <qapplication.h>#include "init_qt.h"// This object is here just to provide a way to connect to socket notifiersclass QDWatcher : public QObject
{
Q_OBJECT
public slots:
void slotInput(int);
public:
QDWatcher(void) {}
~QDWatcher(void) {}
};
int pipe_read=3, pipe_write=4;
int rev_pipe=5;
struct timeval * exit_tv=0;
static QSocketNotifier *input_sn;
static QDWatcher * watcher;
// This is the thread, which will be processing stream-related requests.// The point is to minimize the chance of dead locks: With this thread the system will// work find even if the main thread requests data, which is not available.// There still may be dead locks though because requests like NPP_New/NPP_AttachWindow,// etc. must be processed by the main thread sychronously.staticGThread str_thread;
void
PipesAreDead(void)
{
DEBUG_MSG("PipesAreDead(): Killing ""the rest of pipes and removing input handlers\n");
delete input_sn; input_sn=0;
close(pipe_read); pipe_read=-1;
close(pipe_write); pipe_write=-1;
close(rev_pipe); rev_pipe=-1;
// Don't close the watcher here: you may be called from its slot.// delete watcher; watcher=0;if (qApp) qApp->exit(1);
else exit(1);
}
void
QDWatcher::slotInput(int)
{
DEBUG_MSG("QDWatcher::slotInput() called: ""smth is in the netscape pipe\n");
try
{
Dispatch();
}
catch(constGException & exc)
{
exc.perror();
constchar *msg = exc.get_cause();
if (!GException::cmp_cause(msg, PipeError::Tag))
PipesAreDead();
}
}
void
WorkWithNetscape(void)
{
DEBUG_MSG("WorkWithNetscape(): ""working together with netscape\n");
WriteString(pipe_write, "Here am I"); // Plugin is waiting for this// #ifdef DJVU_EDITOR// DjVuTerminator::AddPipe(pipe_read);// DjVuTerminator::AddPipe(pipe_write);// DjVuTerminator::AddPipe(rev_pipe);// #endif
exit_tv=new timeval;
exit_tv->tv_sec=INACTIVITY_TIMEOUT/1000;
exit_tv->tv_usec=0;
while(true)
{
if (qApp)
{
if (!watcher)
{
watcher=new QDWatcher();
input_sn=new QSocketNotifier(pipe_read, QSocketNotifier::Read,
watcher, "input_sn");
input_sn->setEnabled(TRUE);
QObject::connect(input_sn, SIGNAL(activated(int)),
watcher, SLOT(slotInput(int)));
}
int rc=qApp->exec();
DEBUG_MSG("QApplication::exec() returned rc=" << rc << "\n");
CleanupQT();
exit(rc);
}
fd_set read_fds;
FD_ZERO(&read_fds);
FD_SET(pipe_read, &read_fds);
int rc=select(pipe_read+1, &read_fds, 0, 0, exit_tv);
if (rc<0 && errno!=EINTR)
G_THROW(ERR_MSG("WorkWithNetscape.pipe_listen_fail"));
if (rc==0)
{
DEBUG_MSG("Shutdown timeout => exit\n");
exit(0);
}
if (rc>0 && FD_ISSET(pipe_read, &read_fds))
Dispatch();
}
}
#include "netscape_moc.inc"